Automatic vacuum packaging equipment for fresh corn

Abstract

The invention relates to the technical field of packaging equipment, and particularly discloses fresh corn automatic vacuum packaging equipment which comprises a machine body, a rotating disc bag feeding system and a rotating disc vacuum system, and the rotating disc bag feeding system and the rotating disc vacuum system are arranged at the top of the machine body. And a clamping mechanism, a tightening mechanism, a synchronous driving mechanism and a heat sealing mechanism are arranged in the vacuum box. The effects of multi-point fixing of a packaging bag, automatic centering, deviation rectifying and clamping of corn and further front-back holding and fixing are achieved in sequence through cooperation of air pressure generated after the active air bag is extruded and hydraulic oil, the whole process is completed in the vacuum cover closing process, extra time does not need to be consumed, and therefore on the premise that the vacuum packaging efficiency is the same, the labor intensity of workers is lowered. The vacuum packaging quality of the corn is greatly improved, the packaging reject ratio is reduced, and the whole production cycle of the fresh corn does not need to be prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of packaging equipment, and more specifically, to automatic vacuum packaging equipment for fresh corn. Background Art

[0002] Fresh corn, also known as sweet corn or fruit corn, is a special variety of corn, which is famous for its high sweetness and good taste. Different from traditional feed corn and industrial corn, fresh corn is mainly eaten directly as a fresh food, or processed into canned, frozen food, etc. The production and processing flow of fresh corn generally includes: pretreatment, cleaning, peeling, cutting, grading, vacuum packaging, cleaning and cooling, and packaging for shipment. Among them, in the vacuum packaging process, the double turntable bag-feeding vacuum packaging machine is currently the most commonly used equipment for packaging fresh corn. Specifically: the corn cob is sent into the already opened packaging bag through the bag-supporting mechanism, and then the bag-supporting mechanism is turned over and the vacuum cover is closed, the air in the bag is evacuated by a vacuum pump, and finally the bag opening is heat-sealed. However, this packaging method still has certain defects: 1. Before vacuum packaging, since the space in the packaging bag is larger at this time, the corn can move freely in the packaging bag, resulting in the corn not being placed vertically and centered in the packaging bag, but being offset and tilted, and the position offset will cause uneven distribution of the internal space of the packaging bag, which will cause the bag to deform during the vacuum and sealing process, affecting the sealing quality, and the vacuum packaging defective rate needs to be optimized.

[0003] 2. During the vacuum packaging process, the packaging bag with only the bag mouth clamped is completely flattened under the gravity of the corn itself, which may cause one side of the packaging bag to be subjected to greater pressure due to the deviation of the corn, while the other side may be relaxed due to the small force. This uneven force will cause the sealing of the packaging bag to be uneven, increasing the risk of sealing failure. In addition, the bag may have wrinkles when it is sealed due to uneven distribution of internal space. These wrinkles not only affect the quality of the seal, but also increase the risk of air leakage during subsequent transportation or storage. Summary of the invention

[0004] The invention provides an automatic vacuum packaging device for fresh corn, which solves the technical problems in the prior art that corn is not placed vertically and centered in a packaging bag during vacuum packaging and that during the vacuum packaging process, only the bag opening is clamped and the packaging bag is completely leveled under the action of the weight of the corn itself.

[0005] The invention provides an automatic vacuum packaging device for fresh corn, comprising a machine body, a turntable bag feeding system and a turntable vacuum system arranged on the top of the machine body, the turntable vacuum system comprising a plurality of vacuum boxes and vacuum covers hinged to the vacuum boxes, a clamping mechanism, a tightening mechanism, a synchronous driving mechanism, a heat sealing mechanism, a holding mechanism and a deviation correction and centering mechanism for correcting the deviation of corn in a packaging bag are arranged in the vacuum box, and the deviation correction and centering mechanism comprises two left-right symmetrical control components and two left-right symmetrical but front-to-back arranged deviation correction components.

[0006] The correcting assembly includes a mounting sleeve fixedly mounted on the inner wall of the bottom of the vacuum box and a mounting seat fixedly mounted on the front side of the mounting sleeve, a sliding groove is provided on the side of the mounting seat away from the inner wall of the vacuum box, a sliding block is slidably connected in the sliding groove, a moving seat is fixedly mounted on the side of the sliding block away from the inner wall of the vacuum box, a fixed seat located below the moving seat is fixedly mounted on the side of the mounting seat away from the inner wall of the vacuum box, a scissor arm group that crosses each other in an X shape is hinged between the fixed seat and the moving seat, and a correcting plate is fixedly mounted on the side of the scissor arm group away from the moving seat through a moving frame.

[0007] The turntable bag feeding system puts the packaging bag filled with corn into the vacuum box, and then clamps the bag opening through the clamping mechanism. Then the vacuum cover is closed to make the driving mechanism drive the left and right correcting plates to approach each other, so that the tightening mechanism tightens the tail of the bag. Then the correcting plate corrects the corn, aligns it and clamps it, and then the clamping mechanism clamps the corn front and back.

[0008] Furthermore, the movable frame is hinged to the lower end of the scissors arm group, and an adaptation groove is provided on the movable frame. The upper end of the scissors arm group is slidably connected in the adaptation groove. The width of the movable seat on the right is larger than that of the movable seat on the left. A sliding groove 2 is provided on the left side of the mounting sleeve on the right, and a slider 2 fixedly connected to the movable seat on the right is slidably connected in the sliding groove 2.

[0009] Furthermore, the control component includes an oil groove and a control cavity provided in the mounting seat, a sealing plate 1 is slidably connected in the oil groove, a control rod slidably penetrating the oil groove and extending into the control cavity is fixedly installed at the bottom of the sealing plate 1, a control plate is fixedly installed at the bottom end of the control rod, a reset spring 1 is fixedly installed at the bottom of the control plate, a receiving groove for accommodating the reset spring 1 is provided at the bottom of the control cavity, the top end of the control plate slides through the control cavity and is fixedly connected to a slider 1, an oil pipe is fixedly installed on the top of the mounting seat, a sealing plate 2 is slidably connected in the oil pipe, and hydraulic oil is filled between the sealing plates 1 and 2.

[0010] Furthermore, the clamping mechanism includes a clamping component and a driving component 2, the driving component 2 includes a groove opened in the vacuum box and a passive airbag fixedly installed on the concave surface of the groove, an air supply pipe is fixedly installed on the rear side of the passive airbag, an ear plate 2 is fixedly installed on the top of the passive airbag, and a return spring 3 is jointly installed between the ear plate 2 and the rear inner wall of the vacuum box, and the clamping component includes a rear clamping plate fixedly installed on the front side of the passive airbag and a front clamping plate fixedly installed on the inner wall of the vacuum cover and matched with the rear clamping plate.

[0011] Furthermore, the clamping mechanism includes two columns that are rotatably installed on the inner wall of the bottom of the vacuum box and are symmetrical on the left and right sides. The installation sleeves on the left and right sides are respectively slidably sleeved on the outside of the two columns. Two rear clamping plates are jointly installed on the two top surfaces of the groove through the same fixed plate. The top ends of the two columns are rotatably installed with front clamping plates, and the two front clamping plates on the left and right sides are respectively matched with the two rear clamping plates.

[0012] Furthermore, the tightening mechanism includes a gear assembly and two symmetrical clamping assemblies, the clamping assembly includes a fixed rod fixedly installed on the inner wall of the rear side of the vacuum box and a fixed clamping plate fixedly installed on the front end of the fixed rod, a shaft sleeve is fixedly installed on the side of the fixed clamping plate away from the fixed rod, a rotating shaft is rotatably installed in the shaft sleeve, a rotating clamping plate is rotatably installed on the bottom end of the rotating shaft, a torsion spring is arranged between the rotating shaft and the shaft sleeve, when the vacuum cover is closed, the torsion spring drives the rotating clamping plate to rotate toward the side close to the fixed clamping plate and presses the packaging bag against the fixed clamping plate.

[0013] Furthermore, the gear assembly includes two rotating shafts which are rotatably mounted on the inner wall of the rear side of the vacuum box and are symmetrical on the left and right. The outer sides of the two rotating shafts are fixedly sleeved with spur gears, and the bottoms of the two movable frames are fixedly mounted with racks. A receiving groove is provided on the right inner wall of the vacuum box. When the vacuum cover is opened, the rack on the right is located in the receiving groove, and the left and right racks are respectively meshed with the two spur gears. The outer sides of the two rotating shafts are fixedly sleeved with driving bevel gears, and the top ends of the two rotating shafts are fixedly sleeved with driven bevel gears meshing with the driving bevel gears.

[0014] Furthermore, the heat sealing mechanism includes a cylinder fixedly installed on the rear side of the vacuum box, the output end of the cylinder slides through the inner wall of the rear side of the vacuum box and is fixedly installed with a heat sealing head, and a heat sealing plate is fixedly installed on the inner wall of the vacuum cover to press the bag opening of the packaging bag against the heat sealing head.

[0015] Furthermore, the synchronous drive mechanism includes a drive component 1 and two pressure rods fixedly installed on the inner wall of the vacuum cover and symmetrical on the left and right. The drive component 1 includes an active airbag fixedly installed on the inner wall of the rear side of the vacuum box. Ear plates 1 are fixedly installed on the left and right sides of the active airbag. Guide grooves are opened on the inner walls of the left and right sides of the vacuum box. Ear plate 1 is slidably connected in the guide groove away from the side of the active airbag. A return spring 2 is jointly installed between the ear plate 1 and the inner wall of the rear side of the vacuum box. The top ends of the oil pipe and the air pipe are fixedly connected to the active airbag.

[0016] Furthermore, an exhaust pipe is fixedly installed on the rear side of the vacuum box, and the turntable vacuum system also includes a vacuum assembly and a turntable assembly. The vacuum assembly is fixedly connected to the exhaust pipe and is used to extract the air in the vacuum box after the vacuum cover is closed. The turntable assembly is used to control several vacuum boxes to perform circular motion synchronously. The active airbag and the passive airbag are both composed of a fixed section and a folding section. The fixed section of the active airbag is fixedly installed on the inner wall of the rear side of the vacuum box, and the fixed section of the passive airbag is fixedly installed on the concave surface of the groove. When the vacuum cover is closed, it will drive the pressure rod to squeeze the active airbag. A feeding system for unloading vacuum-packed corn packaging bags is provided on the top of the machine body.

[0017] The beneficial effects of the present invention are: 1. In the present application, by utilizing the closing stroke of the vacuum cover in coordination with the active airbag, and then utilizing the air pressure after the active airbag is squeezed in coordination with the hydraulic oil, the multi-point fixation of the packaging bag, the automatic centering and correction clamping of the corn, and the front and rear clamping for further fixation are achieved in sequence, and the entire process is completed during the closing process of the vacuum cover without wasting extra time. Therefore, under the premise of the same vacuum packaging efficiency, the vacuum packaging quality of the corn is greatly improved, the packaging defective rate is reduced, and there is no need to extend the entire production cycle of fresh corn.

[0018] 2. In the present application, the two deflection-correcting plates can act synchronously to accurately adjust the corn to the center of the packaging bag, thereby preventing the corn from tilting or shifting in the bag. This not only improves the visual effect of the packaging, but also ensures the uniform distribution of the space inside the bag, reduces the deformation of the packaging bag caused by improper position of the corn, and affects the subsequent vacuum packaging and heat sealing, thereby greatly improving the aesthetic quality of the vacuum packaging, avoiding the poor air leakage of the vacuum packaging caused by the crooked position of the corn in the packaging bag, and reducing the defective rate.

[0019] 3. In the present application, the four corners of the packaging bag are fixed by the cooperation of the rotating clamp and the fixed clamp, which prevents the bag from shifting during the vacuum and sealing process, ensures the flatness of the bag, and improves the quality of the sealing. At the same time, through the cooperation of the passive airbag and the front and rear clamping plates, multiple fixations of the corn are achieved, thereby further improving the stability of the corn during vacuum packaging.

[0020] 4. The active airbag is gradually squeezed by the pressure rod, and the mechanical movement of the vacuum cover closing is directly converted into a pneumatic signal, ensuring that the start and end time of each action are highly consistent, and ensuring that the start and end time of subsequent tightening, correction and fixation are highly consistent, thereby greatly improving the smoothness of the connection between the execution of each action, avoiding operational errors caused by time difference, and improving the overall efficiency of automatic correction and centering of corn. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0022] Figure 2 It is a partial three-dimensional structural schematic diagram of the vacuum box, vacuum cover, clamping mechanism, deviation correction and centering mechanism and tensioning mechanism of the present invention.

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the active airbag, the ear plate 1, the return spring 2 and the passive airbag part of the present invention.

[0024] Figure 4 It is a partial three-dimensional structural schematic diagram of the heat sealing mechanism of the present invention.

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of the air extraction pipe, vacuum box, clamping mechanism and groove part of the present invention.

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the synchronous drive mechanism, oil pipe, air pipe and rear clamping plate of the present invention.

[0027] Figure 7 It is a schematic diagram of the three-dimensional structure of the scissor arm assembly, the movable frame, the deviation-correcting plate and the rack part of the present invention.

[0028] Figure 8 It is a schematic diagram of the three-dimensional structure of the rotating shaft, driving bevel gear, driven bevel gear, spur gear and rotating clamping plate of the present invention.

[0029] Fig. 9 It is a schematic diagram of the three-dimensional structure of the oil tank, sealing plate 2, control rod, control plate and control chamber of the present invention.

[0030] Fig.10 It is a schematic diagram of the three-dimensional structure of the sealing plate 2 and the oil pipe part of the present invention.

[0031] Fig.11 It is a schematic diagram of the three-dimensional structure of the vacuum cover, heat sealing plate, front clamping plate and pressure rod part of the present invention.

[0032] Fig.12 It is a state diagram when the heat sealing head and the heat sealing plate of the present invention cooperate to heat seal the bag opening of the packaging bag.

[0033] In the figure: 1. machine body; 2. turntable bag feeding system; 3. turntable vacuum system; 31. vacuum box; 32. vacuum cover; 33. exhaust pipe; 34. clamping mechanism; 35. deviation correction and centering mechanism; 36. tightening mechanism; 37. synchronous driving mechanism; 38. heat sealing mechanism; 39. holding mechanism; 4. unloading system; 341. column; 342. front clamping plate; 343. rear clamping plate; 351. deviation correction component; 352. control component; 3510, slider 1; 3511, moving seat; 3512, fixed seat; 3513, scissor arm group; 3514, moving frame; 3515, adaption groove; 3516, deviation correction plate; 3517, mounting sleeve; 3518, mounting seat; 3519, slide 1; 3521, oil tank; 3522, sealing plate 1; 3523, control rod; 3524, control plate; 3525, control chamber; 3526, return spring 1; 3527, oil pipe; 3528, sealing plate 2; 361, clamping assembly; 362, gear assembly; 3611, fixing rod; 3612, fixing clamping plate; 3613, shaft sleeve; 3614, rotating clamping plate; 3621, rotating shaft; 3622, spur gear; 3623, rack; 3624, driving bevel gear; 3625, driven bevel gear; 3626, containing groove; 371, driving assembly 1; 372, pressure rod; 3711, active airbag; 3712, ear plate one; 3713, guide groove; 3714, return spring two; 381, cylinder; 382, ​​heat sealing head; 383, heat sealing plate; 391, clamping assembly; 392, driving assembly two; 3911, rear clamping plate; 3912, front clamping plate; 3921, passive airbag; 3922, air pipe; 3923, ear plate two; 3924, return spring three; 3925, groove. DETAILED DESCRIPTION

[0034] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is to enable those skilled in the art to better understand and implement the subject matter described herein. The functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the present specification. Various examples may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0035] See also Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6In this embodiment, an automatic vacuum packaging device for fresh corn is proposed, including a machine body 1, a turntable bag feeding system 2 and a turntable vacuum system 3 arranged on the top of the machine body 1, the turntable vacuum system 3 includes a plurality of vacuum boxes 31 and a vacuum cover 32 hinged to the vacuum boxes 31, and the vacuum boxes 31 are provided with a clamping mechanism 34, a tightening mechanism 36, a synchronous driving mechanism 37, a heat sealing mechanism 38, a holding mechanism 39 and a deviation correction and centering mechanism 35 for correcting the deviation of the corn in the packaging bag. The deviation correction and centering mechanism 35 includes left and right Two symmetrical control components 352 and two correcting components 351 which are symmetrical on the left and right but arranged front to back, an exhaust pipe 33 is fixedly installed on the rear side of the vacuum box 31, the turntable vacuum system 3 also includes a vacuum component and a turntable component, the vacuum component is fixedly connected to the exhaust pipe 33 and is used to extract the air in the vacuum box 31 after the vacuum cover 32 is closed, the turntable component is used to control several vacuum boxes 31 to perform circular motion synchronously, and a feeding system 4 is provided on the top of the body 1 for feeding the vacuum-packed corn packaging bags.

[0036] It should be noted that the turntable bag feeding system 2, the unloading system 4, the vacuum assembly and the turntable assembly are all prior art, so they are not described in detail in this application. At the same time, since there are several vacuum boxes 31 in this application and their orientations are different, please refer to the orientation description in this application. Figure 2 The triangular coordinate system in .

[0037] See also Figure 5 The driving component 392 includes a groove 3925 opened in the vacuum box 31, and the clamping mechanism 34 includes two columns 341 rotatably installed on the inner wall of the bottom of the vacuum box 31 and symmetrically on the left and right. Two rear clamping plates 343 are installed together on the two top surfaces of the groove 3925 through the same fixing plate. The top ends of the two columns 341 are rotatably installed with front clamping plates 342, and the left and right front clamping plates 342 are respectively matched with the two rear clamping plates 343.

[0038] During specific use, the turntable bag feeding system 2 and the turntable assembly rotate synchronously relative to each other to feed the packaging bag filled with corn into the corresponding vacuum box 31. The fed packaging bag will stick to the two left and right rear clamps 343, and then, the two front clamps 342 are driven by an external power supply to rotate toward the side close to the rear clamp 343, and the two sides of the bag opening of the packaging bag are pressed against the rear clamp 343 (at this time, a section of the bag opening of the packaging bag is exposed above the front clamp 342 and the rear clamp 343 to prepare for subsequent heat sealing). After the bag feeding is completed (at this time, the corn is located between the two correcting components 351 but is not completely centered and is vertically located in the packaging bag), as the turntable bag feeding system 2 and the turntable assembly continue to rotate, the corresponding bag feeding components and the corresponding vacuum box 31 are separated, and then the vacuum cover 32 begins to close.

[0039] See also Figure 2 , Figure 3, Figure 5 , Figure 6 and Fig.11 The synchronous driving mechanism 37 includes a driving component 371 and two pressure rods 372 fixedly installed on the inner wall of the vacuum cover 32 and symmetrical on the left and right. The driving component 371 includes an active airbag 3711 fixedly installed on the inner wall of the rear side of the vacuum box 31. Ear plates 3712 are fixedly installed on the left and right sides of the active airbag 3711. Guide grooves 3713 are opened on the inner walls of the left and right sides of the vacuum box 31. The ear plate 3712 is slidably connected in the guide groove 3713 away from the side of the active airbag 3711. A return spring 2 3714 is installed between the ear plate 3712 and the inner wall of the rear side of the vacuum box 31. The active airbag 3711 is composed of a fixed section and a folding section. When the vacuum cover 32 is closed, the pressure rod 372 will be driven to squeeze the active airbag 3711.

[0040] See also Figure 2 , Figure 3 , Figure 7 , Fig. 9 and Fig.10 The deviation correction component 351 includes a mounting sleeve 3517 fixedly mounted on the inner wall of the bottom of the vacuum box 31 and a mounting seat 3518 fixedly mounted on the front side of the mounting sleeve 3517. The mounting sleeves 3517 on the left and right sides are respectively slidably mounted on the outside of the two columns 341. The control component 352 includes an oil groove 3521 and a control cavity 3525 opened in the mounting seat 3518. A sealing plate 3522 is slidably connected in the oil groove 3521. The bottom of the sealing plate 3522 is fixedly mounted with a sliding oil groove 3521 extending to the control cavity 3525. A control rod 3523 in 525, a control plate 3524 is fixedly installed on the bottom end of the control rod 3523, a return spring 3526 is fixedly installed on the bottom of the control plate 3524, a receiving groove for receiving the return spring 3526 is provided at the bottom of the control chamber 3525, an oil pipe 3527 is fixedly installed on the top of the mounting seat 3518, a sealing plate 2 3528 is slidably connected in the oil pipe 3527, hydraulic oil is filled between the sealing plate 1 3522 and the sealing plate 2 3528, and the top of the oil pipe 3527 is fixedly connected to the active airbag 3711.

[0041] During specific use, as the vacuum cover 32 is closed, the pressure rod 372 will gradually begin to squeeze the folded section of the active airbag 3711, driving the folded section to move backward, and at the same time squeezing the return spring 2 3714. As the active airbag 3711 is gradually squeezed, the air inside it is squeezed into the oil pipe 3527. The air squeezed into the oil pipe 3527 will squeeze the sealing plate 2 3528 to move downward. As the sealing plate 2 3528 moves downward, it will squeeze the hydraulic oil between it and the sealing plate 1 3522, thereby driving the sealing plate 1 3522 to move downward in the oil groove 3521, and then driving the control rod 3523 to push the control plate 3524 to overcome the elastic force of the return spring 1 3526 and move downward.

[0042] It should be noted that the opening diameter at the top of the oil pipe 3527 is smaller than the diameter of the second sealing plate 3528 to prevent the second sealing plate 3528 from slipping out of the oil pipe 3527 .

[0043] See also Figure 2 , Figure 3 , Figure 7 and Fig. 9 A slide groove 3519 is provided on the side of the mounting seat 3518 away from the inner wall of the vacuum box 31, and a slider 3510 is slidably connected in the slide groove 3519. The top of the control panel 3524 slides through the control cavity 3525 and is fixedly connected to the slider 3510. A moving seat 3511 is fixedly installed on the side of the slider 3510 away from the inner wall of the vacuum box 31. A fixed seat 3512 located below the moving seat 3511 is fixedly installed on the side of the mounting seat 3518 away from the inner wall of the vacuum box 31. A scissor arm group 3513 that crosses each other in an X shape is hinged between the fixed seat 3512 and the moving seat 3511. A correction plate 3516 is fixedly installed on the side of the scissor arm group 3513 away from the moving seat 3511 through a moving frame 3514.

[0044] See also Figure 2 , Figure 3 and Figure 7 The movable frame 3514 is hinged with the lower end of the scissor arm group 3513, and an adaption groove 3515 is provided on the movable frame 3514. The upper end of the scissor arm group 3513 is slidably connected in the adaption groove 3515. The width of the movable seat 3511 on the right is greater than that of the movable seat 3511 on the left. A sliding groove 2 is provided on the left side of the installation sleeve 3517 on the right, and a slider 2 fixedly connected to the movable seat 3511 on the right is slidably connected in the sliding groove 2.

[0045] See also Figure 2 , Figure 3 , Figure 7 and Figure 8The tensioning mechanism 36 includes a gear assembly 362 and two symmetrical clamping assemblies 361. The clamping assembly 361 includes a fixed rod 3611 fixedly installed on the inner wall of the rear side of the vacuum box 31 and a fixed clamping plate 3612 fixedly installed on the front end of the fixed rod 3611. A shaft sleeve 3613 is fixedly installed on the side of the fixed clamping plate 3612 away from the fixed rod 3611. A rotating shaft (not shown in the figure) is rotatably installed in the shaft sleeve 3613. A rotating clamping plate 3614 is rotatably installed at the bottom of the rotating shaft. A torsion spring is arranged between the rotating shaft and the shaft sleeve 3613. When the vacuum cover 32 is closed, the torsion spring drives the rotating clamping plate 3614 to rotate toward the side close to the fixed clamping plate 3612 and presses the packaging bag onto the fixed clamping plate 3612.

[0046] See also Figure 2 , Figure 3 , Figure 5 , Figure 7 and Figure 8 The gear assembly 362 includes two rotating shafts 3621 rotatably mounted on the inner wall of the rear side of the vacuum box 31 and symmetrically mounted on the left and right sides. The outer sides of the two rotating shafts 3621 are fixedly sleeved with spur gears 3622. The bottoms of the two moving frames 3514 are fixedly mounted with racks 3623. The left and right racks 3623 are respectively meshed with the two spur gears 3622. A receiving groove 3626 is provided on the right inner wall of the vacuum box 31. When the vacuum cover 32 is opened, the rack 3623 on the right side is located in the receiving groove 3626. The outer sides of the two rotating shafts 3621 are fixedly sleeved with driving bevel gears 3624. The top ends of the two rotating shafts are fixedly sleeved with driven bevel gears 3625 meshed with the driving bevel gears 3624.

[0047] It should be noted that the contact surfaces of the rotating clamping plate 3614, the fixed clamping plate 3612, the front clamping plate 342 and the rear clamping plate 343 with the packaging bag are all provided with rubber anti-skid pads to improve the clamping effect and avoid slipping after clamping the packaging bag.

[0048] When in use, as the control plate 3524 gradually moves downward, the slider 3510 will be driven downward, thereby driving the moving seat 3511 to move toward the side close to the fixed seat 3512, and then gradually unfolding the scissor arm group 3513. As the scissor arm group 3513 is unfolded, the moving frame 3514 will be gradually pushed to move toward the side close to the corn, thereby driving the correcting plate 3516 to move synchronously. While moving, the moving frame 3514 will also drive the rack 3623 to drive the spur gear 3622 to rotate, thereby driving the rotating shaft 3621 to rotate, and then driving the driving bevel gear 3624 to drive the driven bevel gear 3625 to rotate, so that the rotating shaft rotates, thereby driving the rotating splint 3614 to rotate toward the side close to the fixed splint 3612 and press the tail of the packaging bag against the fixed splint 3612, thereby fixing the four corners of the entire packaging bag, and then as the moving frame 35 14 Continuing to move the rack 3623 will disengage from the gear, and the rotating clamp 3614 will press the tail of the packaging bag under the action of the torsion spring. At the same time, the moving frame 3514 will drive the correcting plate 3516 to contact and squeeze the corn. Under the action of the two correcting plates 3516 approaching and squeezing simultaneously, the corn is gradually adjusted to a vertical state and is finally clamped in the middle of the packaging bag by the two correcting plates 3516. By utilizing the closing stroke of the vacuum cover 32 and cooperating with the active airbag 3711, and then utilizing the air pressure after the active airbag 3711 is squeezed and the hydraulic oil, the multi-point fixation of the packaging bag, the automatic centering and correcting clamping of the corn, and the front and rear clamping for further fixation are achieved in sequence. The entire process is completed during the closing process of the vacuum cover 32 without wasting extra time. Therefore, under the premise of the same vacuum packaging efficiency, the vacuum packaging quality of the corn is greatly improved and the packaging defect rate is reduced.

[0049] See also Figure 2 , Figure 3 , Figure 5 , Figure 6 , Fig. 9 and Fig.11 The clamping mechanism 39 includes a clamping assembly 391 and a driving assembly 2 392. The driving assembly 2 392 also includes a passive airbag 3921 fixedly installed on the concave surface of the groove 3925. An air pipe 3922 is fixedly installed on the rear side of the passive airbag 3921. An ear plate 2 3923 is fixedly installed on the top of the passive airbag 3921. A return spring 3924 is commonly installed between the ear plate 2 3923 and the rear inner wall of the vacuum box 31. The clamping assembly 391 includes a rear clamping plate 3911 fixedly installed on the front side of the passive airbag 3921 and a front clamping plate 3912 fixedly installed on the inner wall of the vacuum cover 32 and matched with the rear clamping plate 3911. The top end of the air pipe 3922 is fixedly connected to the active airbag 3711. The passive airbag 3921 is composed of a fixed section and a folding section. The fixed section of the passive airbag 3921 is fixedly installed on the concave surface of the groove 3925.

[0050] It should be noted that a two-way pressure valve (not shown in the figure) is provided in the gas pipe 3922. When the pressure in the gas pipe 3922 is lower than a preset value, the valve core is pressed against the valve seat, so that the valve is in a closed state, preventing gas from passing through. When the pressure applied from any direction exceeds the preset value, the force generated by the gas overcomes the resistance of the valve core, pushing the valve core away from the valve seat, and the valve opens to allow gas to pass through.

[0051] When in use, after the deviation-correcting plate 3516 corrects the deviation and clamps the corn, the pressure rod 372 continues to squeeze the active airbag 3711 and can no longer squeeze the sealing plate 3528 (because the deviation-correcting plate 3516 is already pressed against the corn at this time). Therefore, as the active airbag 3711 continues to be squeezed, the squeezed air will squeeze the two-way pressure valve core in the air supply pipe 3922, and as the active airbag 3711 continues to be squeezed, the pressure on the two-way pressure valve core gradually increases and eventually opens. After opening, the squeezed air will enter the passive airbag 392 through the air supply pipe 3922. 1, with the entry of air, the folded section of the passive airbag 3921 overcomes the elastic force of the return spring 3924 and gradually moves toward the side of the corn that is already centered, thereby driving the rear clamping plate 3911 to move synchronously. When the vacuum cover 32 is completely closed, the rear clamping plate 3911 contacts the corn, and at the same time, the front clamping plate 3912 located on the inner side of the vacuum cover 32 also contacts the corn and cooperates with the rear clamping plate 3911 to hold the corn tightly, thereby further fixing the corn. Finally, the interior of the vacuum box 31 is evacuated to a vacuum through the vacuum assembly and the exhaust pipe 33, and the packaging bag is vacuum-packaged.

[0052] See also Figure 2 , Figure 4 , Fig.11 and Fig.12 The heat sealing mechanism 38 includes a cylinder 381 fixedly installed on the rear side of the vacuum box 31, the output end of the cylinder 381 slides through the inner wall of the rear side of the vacuum box 31 and is fixedly installed with a heat sealing head 382, ​​and a heat sealing plate 383 is fixedly installed on the inner wall of the vacuum cover 32 to press the bag opening of the packaging bag against the heat sealing head 382. When the vacuum cover 32 is fully closed, the heat sealing plate 383 abuts against the front side of the bag opening of the packaging bag located above the front clamp plate 342 and the rear clamp plate 343.

[0053] During specific use, after the vacuuming is completed, the cylinder 381 is started, and the output end of the cylinder 381 pushes the heat sealing head 382 located on the rear side of the packaging bag to move forward and press the part of the packaging bag opening located above the front clamp plate 342 and the rear clamp plate 343 onto the heat sealing plate 383. Then, the heat sealing head 382 heats the packaging bag opening to heat-seal it, thereby completing the entire self-correcting and centering vacuum packaging process of the fresh corn.

[0054] After the packaging is completed, as the turntable assembly rotates, the vacuum box 31 that has just completed the vacuum packaging operation rotates to the unloading system 4, and then the vacuum cover 32 of the vacuum box 31 is opened. As the vacuum cover 32 is opened, the pressure rod 372 will gradually move and disengage from the active airbag 3711, and the front clamping plate 3912 will disengage from the corn. In this process, first, the return spring 2 3714 pushes the folding section of the active airbag 3711 to move forward for reset. As the folding section of the active airbag 3711 moves, negative pressure will be generated to first draw back the air in the oil groove 3521, so that the pressure on the return spring 1 3526 is reduced and reset occurs, and then the control plate 3524 is pushed to drive the control rod 3523 to move upward. As the control plate 3524 moves upward, the slider 1 3510 moves upward synchronously, driving the moving seat 3511 to move away from the fixed seat 3512, so that the scissor arm group 3513 is folded, and the moving frame 3514 is driven to make the correcting plate 351 6 is separated from the corn. At the same time, during this process, the rack 3623 drives the spur gear 3622 to rotate, so that the driving bevel gear 3624 and the driven bevel gear 3625 cooperate to drive the rotating shaft 3621 to rotate, driving the rotating clamping plate 3614 to reset to the side away from the fixed clamping plate 3612 and separate from the tail of the packaging bag. At the same time, as the control plate 3524 moves upward, the sealing plate 1 3522 moves upward to push the hydraulic oil to drive the sealing plate 1 3522 to move upward for reset. After the sealing plate 1 3522 is completely reset (that is, it moves to the opening of the oil pipe 3527), the correction plate 3516 and the rotating clamping plate 3614 are completely reset (at this time, the rack 3623 and the spur gear 3622 are in a meshing state, preventing the rotating clamping plate 3614 from rotating to a close state with the fixed clamping plate 3612 under the action of the torsion spring, thereby affecting the subsequent bag feeding and tightening of the bag tail). At this time, the corn is released from the fixation and falls on the unloading system 4 under the action of gravity, and is unloaded through the unloading system 4.

[0055] Then, when the folded section of the active airbag 3711 continues to move forward and reset, the sealing plate 1 3522 cannot continue to move, so the pressure generated by the negative pressure on the two-way pressure valve increases until the two-way pressure valve opens. After the two-way pressure valve opens, the air in the passive airbag 3921 is drawn into the active airbag 3711 through the air supply pipe 3922, and at the same time, the reset spring 3924 gradually resets, driving the folded section of the passive airbag 3921 to move backward for reset, thereby driving the rear clamping plate 3911 to move backward and reset. When the active airbag 3711 is fully reset, the rear clamping plate 3911 is also fully reset.

[0056] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. An automatic vacuum packaging device for fresh corn, characterized in that: include: A machine body, a turntable bag feeding system and a turntable vacuum system arranged on the top of the machine body, the turntable vacuum system includes a vacuum box and a vacuum cover hinged to the vacuum box, the vacuum box is provided with a clamping mechanism, a tightening mechanism, a synchronous driving mechanism, a heat sealing mechanism, a holding mechanism and a deviation correction and centering mechanism for correcting the corn in the packaging bag, the deviation correction and centering mechanism includes two left-right symmetrical control components and two left-right symmetrical but front-to-back arranged deviation correction components; The deviation correction component includes a mounting sleeve fixedly mounted on the inner wall of the bottom of the vacuum box and a mounting seat fixedly mounted on the front side of the mounting sleeve, a slide groove is provided on the side of the mounting seat away from the inner wall of the vacuum box, a slider is slidably connected in the slide groove, a moving seat is fixedly mounted on the side of the slider away from the inner wall of the vacuum box, a fixed seat located below the moving seat is fixedly mounted on the side of the mounting seat away from the inner wall of the vacuum box, a scissor arm group intersecting each other in an X shape is hinged between the fixed seat and the moving seat, and a deviation correction plate is fixedly mounted on the side of the scissor arm group away from the moving seat through a moving frame; The turntable bag feeding system puts the packaging bag filled with corn into the vacuum box, and then clamps the bag opening through the clamping mechanism. Then the vacuum cover is closed to make the driving mechanism drive the left and right correcting plates closer together, so that the tightening mechanism tightens the tail of the bag. Then the correcting plate corrects the corn, aligns it and clamps it, and the clamping mechanism clamps the corn from front to back.

2. The automatic vacuum packaging equipment for fresh corn according to claim 1, characterized in that: The moving frame is hinged to the lower end of the scissor arm group, and an adaptation groove is provided on the moving frame. The upper end of the scissor arm group is slidably connected in the adaptation groove. The width of the moving seat on the right is greater than that of the moving seat on the left. A sliding groove 2 is provided on the left side of the mounting sleeve on the right, and a slider 2 fixedly connected to the moving seat on the right is slidably connected in the sliding groove 2.

3. The automatic vacuum packaging equipment for fresh corn according to claim 1, characterized in that: The control component includes an oil groove and a control cavity provided in the mounting seat, a sealing plate 1 is slidably connected in the oil groove, a control rod slidably penetrating the oil groove and extending into the control cavity is fixedly installed at the bottom of the sealing plate 1, a control plate is fixedly installed at the bottom end of the control rod, a reset spring 1 is fixedly installed at the bottom of the control plate, a receiving groove for accommodating the reset spring 1 is provided at the bottom of the control cavity, the top end of the control plate slides through the control cavity and is fixedly connected to a slider 1, an oil pipe is fixedly installed on the top of the mounting seat, a sealing plate 2 is slidably connected in the oil pipe, and hydraulic oil is filled between the sealing plates 1 and 2.

4. The automatic vacuum packaging equipment for fresh corn according to claim 3 is characterized in that: The clamping mechanism includes a clamping component and a driving component 2, the driving component 2 includes a groove opened in the vacuum box and a passive airbag fixedly installed on the concave surface of the groove, an air supply pipe is fixedly installed on the rear side of the passive airbag, an ear plate 2 is fixedly installed on the top of the passive airbag, and a return spring 3 is jointly installed between the ear plate 2 and the rear inner wall of the vacuum box, and the clamping component includes a rear clamping plate fixedly installed on the front side of the passive airbag and a front clamping plate fixedly installed on the inner wall of the vacuum cover and matched with the rear clamping plate.

5. The automatic vacuum packaging equipment for fresh corn according to claim 1, characterized in that: The clamping mechanism includes two columns that are rotatably installed on the inner wall of the bottom of the vacuum box and are symmetrical on the left and right. The installation sleeves on the left and right sides are respectively slidably sleeved on the outside of the two columns. Two rear clamping plates are jointly installed on the two top surfaces of the groove through the same fixed plate. The top ends of the two columns are rotatably installed with front clamping plates, and the two front clamping plates on the left and right cooperate with the two rear clamping plates respectively.

6. The automatic vacuum packaging equipment for fresh corn according to claim 1, characterized in that: The tightening mechanism includes a gear assembly and two symmetrical clamping assemblies, the clamping assembly includes a fixed rod fixedly installed on the inner wall of the rear side of the vacuum box and a fixed clamping plate fixedly installed on the front end of the fixed rod, a shaft sleeve is fixedly installed on the side of the fixed clamping plate away from the fixed rod, a rotating shaft is rotatably installed in the shaft sleeve, a rotating clamping plate is rotatably installed on the bottom end of the rotating shaft, a torsion spring is arranged between the rotating shaft and the shaft sleeve, when the vacuum cover is closed, the torsion spring drives the rotating clamping plate to rotate toward the side close to the fixed clamping plate and presses the packaging bag against the fixed clamping plate.

7. The automatic vacuum packaging equipment for fresh corn according to claim 6, characterized in that: The gear assembly includes two rotating shafts which are rotatably mounted on the inner wall at the rear side of the vacuum box and are symmetrical on the left and right. The outer sides of the two rotating shafts are fixedly sleeved with spur gears. The bottoms of the two movable frames are fixedly mounted with racks. A receiving groove is provided on the right inner wall of the vacuum box. When the vacuum cover is opened, the rack on the right is located in the receiving groove. The left and right racks are respectively meshed with the two spur gears. The outer sides of the two rotating shafts are fixedly sleeved with driving bevel gears. The top ends of the two rotating shafts are fixedly sleeved with driven bevel gears which mesh with the driving bevel gears.

8. The automatic vacuum packaging equipment for fresh corn according to claim 1, characterized in that: The heat sealing mechanism includes a cylinder fixedly installed on the rear side of the vacuum box, the output end of the cylinder slides through the inner wall of the rear side of the vacuum box and is fixedly installed with a heat sealing head, and a heat sealing plate that presses the bag opening of the packaging bag against the heat sealing head is fixedly installed on the inner wall of the vacuum cover.

9. The automatic vacuum packaging equipment for fresh corn according to claim 4, characterized in that: The synchronous driving mechanism includes a driving component 1 and two pressure rods fixedly installed on the inner wall of the vacuum cover and symmetrical on the left and right. The driving component 1 includes an active airbag fixedly installed on the inner wall of the rear side of the vacuum box. Ear plates 1 are fixedly installed on the left and right sides of the active airbag. Guide grooves are opened on the inner walls of the left and right sides of the vacuum box. Ear plate 1 is slidably connected in the guide groove away from the side of the active airbag. A reset spring 2 is installed between the ear plate 1 and the inner wall of the rear side of the vacuum box. The top ends of the oil pipe and the air pipe are fixedly connected to the active airbag.

10. The automatic vacuum packaging equipment for fresh corn according to claim 9, characterized in that: An exhaust pipe is fixedly installed on the rear side of the vacuum box. The turntable vacuum system also includes a vacuum assembly and a turntable assembly. The vacuum assembly is fixedly connected to the exhaust pipe and is used to extract air from the vacuum box after the vacuum cover is closed. The turntable assembly is used to control the vacuum box to perform circular motion synchronously. The active airbag and the passive airbag are both composed of a fixed section and a folding section. The fixed section of the active airbag is fixedly installed on the inner wall of the rear side of the vacuum box, and the fixed section of the passive airbag is fixedly installed on the concave surface of the groove. When the vacuum cover is closed, the pressure rod will be driven to squeeze the active airbag. A feeding system for unloading corn packaging bags that have been vacuum-packed is provided on the top of the machine body.

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